hi there, we're expecting our first baby end of september and we took the antenatal class with family zone back in June (you can find the details in the event calendar of geobaby).
When we register they asked us the due date and recommended us to take the course in July, but with family from overseas in town over the summer, we decided to take it a bit earlier and does find it quite useful to get more information in advance. That course does cover information on various topics from birth plan to baby basics.
If you are looking for something with practical exercise, the government hospitals (we are registered with QMH) provide antenatal exercise class (in english) and i'm going to have my last class next week. They have signed me up upon my first checkup at the public clinic, and if I remember correctly all classes must be completed by week-32. There are 5 classes from covering relaxation, comfort measures, breathing techniques, pushing, birth balls etc...
Hope this helps.